Struct salvo::http::headers::IfMatch

pub struct IfMatch(_);

If-Match header, defined in RFC7232

The If-Match header field makes the request method conditional on the recipient origin server either having at least one current representation of the target resource, when the field-value is “*”, or having a current representation of the target resource that has an entity-tag matching a member of the list of entity-tags provided in the field-value.

An origin server MUST use the strong comparison function when comparing entity-tags for If-Match, since the client intends this precondition to prevent the method from being applied if there have been any changes to the representation data.

ABNF

If-Match = "*" / 1#entity-tag

Example values

• "xyzzy"
• “xyzzy”, “r2d2xxxx”, “c3piozzzz”

Examples

use headers::IfMatch;

let if_match = IfMatch::any();

Implementations

impl IfMatch

pub fn any() -> IfMatch

Create a new If-Match: * header.

pub fn is_any(&self) -> bool

Returns whether this is If-Match: *, matching any entity tag.

pub fn precondition_passes(&self, etag: &ETag) -> bool

Checks whether the ETag strongly matches.

Trait Implementations

impl Clone for IfMatch

pub fn clone(&self) -> IfMatch

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IfMatch

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<ETag> for IfMatch

pub fn from(etag: ETag) -> IfMatch

Performs the conversion.

impl Header for IfMatch

pub fn name() -> &'static HeaderName

The name of this header.

pub fn decode<'i, I>(values: &mut I) -> Result<IfMatch, Error> where
    I: Iterator<Item = &'i HeaderValue>, 

Decode this type from an iterator of HeaderValues.

pub fn encode<E>(&self, values: &mut E) where
    E: Extend<HeaderValue>, 

Encode this type to a HeaderMap.

impl PartialEq<IfMatch> for IfMatch

pub fn eq(&self, other: &IfMatch) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &IfMatch) -> bool

This method tests for !=.

impl StructuralPartialEq for IfMatch